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參數(shù)資料
| 型號： | TDA7326D |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 140 MHz, PDSO16 |
| 封裝： | SO-16 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 1133K |
| 代理商： | TDA7326D |
3.4 REFERENCE FREQUENCY GENERATOR
The crystal oscillator clock is divided by the
reference frequency divider to provide the ref-
erence frequency to the phase comparator.
Reference frequency divider range is select-
able by the programming bit ’fREF’.
Available reference frequency are shown in
following table.
PREDIVIDER
R
OSC IN
REGISTER
PC7 .. PC0
COUNTER : C
AM IN
FM IN
REGISTER
SC5 .. SC0
PD
fref
fsyn
D94AU102
MSB
Figure 3: AM direct mode operation for SW, MW and LW
Figure 4: Phase comparator
AM/FM
fREF
fREF (kHz)
0
12.5
01
25
10
1
11
2.5
TABLE 3.4
TDA7326
7/16
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